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Table 1 Expression of CRD genes under various levels of chromate stressa.

From: High-level chromate resistance in Arthrobactersp. strain FB24 requires previously uncharacterized accessory genes

CRD Gene Basal Expression
In 0 mM Cr(VI)b × 102
Relative Fold Differencec
Cr(VI)/0 mM Cr(VI)
   0.005 0.025 0.05 0.1 5 20 100
chrL 4.20
(0.45)
36.7*
(9.3)
95.2
(8.7)
69.8
(12.1)
95.1
(42.9)
63.4
(29.7)
45.1*
(14.3)
15.3*
(3.5)
chrA 6 2.25
(0.36)
8.5*
(1.3)
16.2*
(3.9)
27.4*
(2.5)
42.1
(4.2)
50.7
(14.5)
37.6
(9.8)
22.9
(8.2)
chrB-Cterm2 15.6
(4.95)
2.0*
(0.3)
2.2*
(0.5)
2.5*
(0.5)
7.1
(2.6)
6.3
(1.8)
8.0
(3.2)
2.0*
(0.8)
SCHR 8.50
(2.06)
1.9*
(0.5)
4.7*
(0.6)
5.1*
(0.7)
7.8
(0.7)
6.8
(1.9)
5.1
(1.2)
2.1*
(0.9)
chrK 21.9
(2.89)
3.7*
(0.5)
6.1*
(0.7)
7.5
(1.9)
10.1
(1.9)
7.2
(1.6)
6.9
(1.6)
4.4
(1.4)
chrB-Nterm 249
(86.4)
8.0
(2.6)
12.5
(4.0)
13.8
(5.6)
18.0
(8.0)
16.9
(7.1)
14.0
(6.5)
4.2
(1.5)
chrB-Cterm 0.51
(0.04)
4.3*
(0.7)
8.4*
(2.1)
16.0*
(1.5)
21.3
(2.0)
25.4
(4.4)
30.9
(6.0)
15.3
(5.5)
chrJ 1.23
(0.40)
7.2*
(1.5)
14.3*
(2.8)
19.0*
(2.5)
37.0
(15.0)
92.4
(47.2)
47.6
(13.2)
19.2
(6.7)
  1. a The basal (0 mM Cr(VI)) transcript levels are given in copy number/ng total RNA. For the remaining concentrations of Cr(VI), the average fold difference relative to the 0 mM Cr(VI) basal state is given. Bold values indicate the concentration at which maximum expression was observed. *, significantly different than the maximum expression level.
  2. b Mean transcript copy number/ng total RNA. SE is given in parentheses (n = 6).
  3. c Mean Fold Difference calculated by dividing the average transcript copy number in each Cr(VI) condition by the average transcript copy number in 0 mM Cr(VI). SE is given in parentheses (n = 6).